Nanoparticles Transport Using Polymeric Nano- and Microgranules: Novel Approach for Advanced Material Design and Medical Applications

Rybyanets, A. N.; Швецов, И. А.; Lugovaya, M. A.; Petrova, E. I.; Shvetsova, N. A.

doi:10.21272/jnep.10(2).02005

Cited by 9 publications

(3 citation statements)

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“…Here, we also confirmed that nonuniform polarization lightly influences the effective properties of OPS. In practice, the SMPS can be produced by the sintering ceramics with special micro granules, 9,10 and then by performing the polarization process. The SMPS contains a metal layer on the pore surface, which is a conductive material.…”

Section: Simulation Of Inhomogeneous Polarizationmentioning

confidence: 99%

“…6,7 Meanwhile, the main disadvantage of the porous material is associated with the degradation of strength characteristics with increasing porosity. The recently proposed technology of local alloying of pores with micro-or nanoparticles of various substances [8][9][10][11] allows the creation of new porous piezocomposites with modified properties at the pore boundaries. In particular, it is possible to obtain porous piezoceramic materials with micro-or nanoparticles of metal or a more rigid polymer deposited at the boundaries of the ceramic matrix with pores to increase the strength of the piezocomposite.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, it is possible to obtain porous piezoceramic materials with micro-or nanoparticles of metal or a more rigid polymer deposited at the boundaries of the ceramic matrix with pores to increase the strength of the piezocomposite. 9,10 The study of the effective material properties of piezocomposites has many features. Since piezoelectric materials are anisotropic, these materials are characterized by a large number of constants.…”

Section: Introductionmentioning

confidence: 99%

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Effective properties of a porous inhomogeneously polarized by direction piezoceramic material with full metalized pore boundaries: Finite element analysis

Наседкин

Nassar

2020

J. Adv. Dielect.

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This paper concerns the homogenization problems for porous piezocomposites with infinitely thin metalized pore surfaces. To determine the effective properties, we used the effective moduli method and the finite element approaches, realized in the ANSYS package. As a simple model of the representative volume, we applied a unit cell of porous piezoceramic material in the form of a cube with one spherical pore. We modeled metallization by introducing an additional layer of material with very large permittivity coefficients along the pore boundary. Then we simulated the nonuniform polarization field around the pore. For taking this effect into account, we previously solved the electrostatic problem for a porous dielectric material with the same geometric structure. From this problem, we obtained the polarization field in the porous piezomaterial; after that, we modified the material properties of the finite elements from dielectric to piezoelectric with element coordinate systems whose corresponding axes rotated along the polarization vectors. As a result, we obtained the porous unit cell of an inhomogeneously polarized piezoceramic matrix. From the solutions of these homogenization problems, we observed that the examined porous piezoceramics composite with metalized pore boundaries has more extensive effective transverse and shear piezomoduli, and effective dielectric constants compared to the conventional porous piezoceramics. The analysis also showed that the effect of the polarization field inhomogeneity is insignificant on the ordinary porous piezoceramics; however, it is more significant on the porous piezoceramics with metalized pore surfaces.

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Section: Simulation Of Inhomogeneous Polarizationmentioning

confidence: 99%